Nice right up on criticism and I won't fail to say you really did a great job in explaining it bit by bit. If I have to say the whole right up pinpointed the advantages and disadvantages of criticism and the effect it haves on many people.
This is what most people don't know and it goes a wrong way to creat the right or wrong information that may bring misjudgements of the entire situation.
People have to understand first the reason why they are been criticized because that is the only way for them to determine if it is actually for constructive criticism or a distractive criticism because when they fail to know why such action is taken against them they seize to change or even turn to worse.